Re: [sage-devel] A bug due to copying a cython object.
This is now https://trac.sagemath.org/ticket/27844 which needs review. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/3bfa8aeb-e6db-4188-aff5-39215107c0c2%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [sage-devel] A bug due to copying a cython object.
On 2019-05-17 10:02, Kwankyu Lee wrote: What is the proper way to copy a cython object with all its attributes? Write a __copy__ method doing the copy manually. Unless I'm missing a Cython feature that helps with this. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/5CDE86DA.4090107%40UGent.be. For more options, visit https://groups.google.com/d/optout.
[sage-devel] A bug due to copying a cython object.
Hi, I observed sage: F = GF(2) sage: E = GF(4) sage: phi = E.coerce_map_from(F); phi Ring morphism: From: Finite Field of size 2 To: Finite Field in z2 of size 2^2 Defn: 1 |--> 1 sage: phi.section() --- TypeError Traceback (most recent call last) ... TypeError: 'NoneType' object is not callable and on the other hand, sage: psi = E._internal_coerce_map_from(F) sage: psi.section() Section of (map internal to coercion system -- copy before use) Ring morphism: From: Finite Field of size 2 To: Finite Field in z2 of size 2^2 If you look into coerce_map_from() method, essentially phi = copy(psi), but while copying the cython object, the information about the section map of psi is lost, and thus the error above. What is the proper way to copy a cython object with all its attributes? -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/c8d673a8-dabb-44bd-87f0-634ebb42b078%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
